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Ultralow-temperature metal passivation phosphorizing liquid and preparation method thereof

A kind of technology of metal passivation and phosphating solution

Active Publication Date: 2016-09-21
安徽子西环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the end of World War II, there were few breakthroughs in phosphating technology, but steady development and improvement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] An ultra-low temperature metal passivation phosphating solution, the components and the mass concentration of each component are as follows: phosphoric acid 100g / L, tartaric acid 2g / L, sodium chlorate 2g / L, sodium dihydrogen phosphate 3g / L, fluotitanic acid 6g / L L, ammonium citrate 8g / L, triethanolamine 6g / L, tannic acid 2g / L, sodium molybdate 3g / L, water-based polyurethane 8g / L, m-xylylenediamine 5g / L.

[0018] Weigh phosphoric acid, tartaric acid, sodium chlorate, dihydrogen phosphate, fluotitanic acid, ammonium citrate, triethanolamine, molybdate, water-based polyurethane and m-xylylenediamine according to the mass concentration, mix well, add water to 1L, Raise the temperature to 60°C and stir for 40 minutes, then add a surfactant and stir to obtain an ultra-low temperature metal passivation phosphating solution.

Embodiment 2

[0020] An ultra-low temperature metal passivation phosphating solution, the components and the mass concentration of each component are as follows: phosphoric acid 300g / L, tartaric acid 18g / L, sodium chlorate 10g / L, zinc dihydrogen phosphate 10g / L, fluotitanic acid 1g / L L, ammonium citrate 2g / L, triethanolamine 1g / L, dodecyltrimethylammonium bromide 10g / L, ammonium molybdate 12g / L, water-based polyurethane 8g / L, m-xylylenediamine 2g / L .

[0021] Weigh phosphoric acid, tartaric acid, sodium chlorate, dihydrogen phosphate, fluotitanic acid, ammonium citrate, triethanolamine, molybdate, water-based polyurethane and m-xylylenediamine according to the mass concentration, mix well, add water to 1L, Raise the temperature to 60°C and stir for 40 minutes, then add a surfactant and stir to obtain an ultra-low temperature metal passivation phosphating solution.

Embodiment 3

[0023] An ultra-low temperature metal passivation phosphating solution, the components and the mass concentrations of each component are as follows: phosphoric acid 150g / L, tartaric acid 6g / L, sodium chlorate 4g / L, sodium dihydrogen phosphate 8g / L, fluotitanic acid 5g / L L, ammonium citrate 6g / L, triethanolamine 2g / L, dodecyltrimethylammonium bromide 4g / L, sodium molybdate 5g / L, water-based polyurethane 18g / L, m-xylylenediamine 3g / L .

[0024] Weigh phosphoric acid, tartaric acid, sodium chlorate, dihydrogen phosphate, fluotitanic acid, ammonium citrate, triethanolamine, molybdate, water-based polyurethane and m-xylylenediamine according to the mass concentration, mix well, add water to 1L, Raise the temperature to 60°C and stir for 40 minutes, then add a surfactant and stir to obtain an ultra-low temperature metal passivation phosphating solution.

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PUM

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Abstract

The invention discloses ultralow-temperature metal passivation phosphorizing liquid and a preparation method thereof. The ultralow-temperature metal passivation phosphorizing liquid comprises the following components in concentration by mass: 100-300 g / L of phosphoric acid, 2-18 g / L of tartaric acid, 2-10 g / L of sodium chlorate, 3-10 g / L of dihydric phosphate, 1-6 g / L of hexafluorotitanic acid, 2-8 g / L of ammonium citrate, 1-6 g / L of triethanolamine, 2-10 g / L of surface active agent, 3-12 g / L of molybdate, 8-20 g / L of waterborne polyurethane, and 2-5 g / L of m-xylylenediamine. The phosphorizing liquid contains no such harmful substances as chromate and nitrite, can reduce the working temperature of high-acidity phosphorizing liquid to 0-20 DEG C, needs no heating, saves a lot of energy, simplifies procedures, and shortens the production period. The phosphorizing liquid has special advantages on metal surface phosphorizing below 10 DEG C, is excellent in film forming performance, and reaches indoor rust preventing period of not less than one year.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment chemicals, and in particular relates to an ultra-low temperature metal passivation phosphating solution and a preparation method thereof. Background technique [0002] Passivation is a method to transform the metal surface into a state that is not easily oxidized, and to delay the corrosion rate of the metal. Corrosion is an electrochemical change process. There are a small amount of electric ions on the untreated metal surface. These electric ions will move from the high potential area (cathode) to the low potential area (anode), thus generating an electric current. Under the action of this current, it will accelerate the destructive attack on the metal and cause corrosion in the weak part of the metal potential. In layman's terms, it is rust. The mechanism of passivation can be explained by thin film theory, that is, passivation is considered to be due to the interaction between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/44
CPCC23C22/44
Inventor 尤为
Owner 安徽子西环保科技有限公司
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